Perhaps you should try some spelling variations:
ban hang » ngan hang
cham duc » pham duc, cham soc, pham duy
te sach » toc sach
hieu va » lieu va, hieu qua
hang di » hang doi, hang vi, hang dien
duc ban » duc tan, duc van, dua ban
va cham » va chat, va tham
vu nang » vuc nang, va nang, vu dang
cua tre » cua te, cuu tre, cua triet
v nang » va nang, van nang, voi nang
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((v nang) OR (vu nang)) ((o hoi) OR (x ho)). hieu va cham duc ban hang di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) OR (vu nang)) ((o hoi) OR (x ho)). hieu va cham duc ban hang di cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) OR (vu nang)) ((o hoi) OR (x ho)). hieu va cham duc ban hang di cua tre*.